My husbands today is raa raa YOU ARE a noisy little lion
For some reason, I too get that intermittently, but my brain mashes it up with Dr Hamster the Vet's proclamation of "Naughty tortoise!" when her pet Tiddles climbs up a tree, thus I find myself singing: "Raa Raa, you are, a naughty little tortoise!"
My DS is 10, so I haven't even seen any Raa Raa or Peppa for years now !?! 
The WBAC one must be the work of some kind of evil musicologist witchcraft purveyor. Don McLean can write and sing:
Starry, starry night
Paint your palette blue and grey
Look out on a summer's day
With eyes that know the darkness in my soul
Shadows on the hills
Sketch the trees and the daffodils
Catch the breeze and the winter chills
In colors on the snowy linen land
BUT.... instead of that masterpiece of beauty, we're all quietly singing all day "Just sold my caa-ar...." 